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LDC-HALL-HMI-EVM: not able to establish communication with GUI

Lenio Cacula
Genius 15900 points
Part Number: LDC-HALL-HMI-EVM

I have updated the drivers, tried different USB ports, used different cables, reviewed the COM port multiple times, and even experimented with different computers. I can't seem to get passed the error that says: 

Unknown EVM(s) Found!
The GUI could not detect a SCB/PAMB controller with a connected LDC-HALL-HMI-EVM daughtercard.

Please check that the appropriate EVM is connected or locate the correct EVM GUI from https://dev.ti.com/gallery/.

If a LDC-HALL-HMI-EVM is connected, then you may attempt to connect to it by selecting "Options > Serial Port ..." from the menu bar.
Any ideas?
  • 0
    TI__Genius 17690 points

    Hello, 

    Are you in operational mode 3 or 4 (half the button LEDs will be illuminated constantly)? Connect to the GUI requires the device to be in one of these modes for the SCB and device info to be properly communicated to the GUI. Modes 1 and 2 are designed for stand alone operation so they do not support the communication to the GUI. 

    If that isn't the issue, you may have to put the SCB in DFU mode before flashing it with the latest firmware. Instructions for this can be found in section 2.4 of the EVM User's Guide:

    Best Regards, 

    Justin Beigel

  • 0 in reply to Justin Beigel
    TI__Genius 15900 points

    Justin,

    the board is not in the correct mode. The user's guide tells us we should press the knob down to switch modes, however nothing happens in my EVM when I do it. Is there something else I'm missing?

    Thank you!

  • 0 in reply to Lenio Cacula
    TI__Genius 17690 points

    Hello, 

    Is the first operational mode working as expected? (only one LED should light up when a button is pressed).

    Also, are the angle LEDs in the top right corner properly updating if you rotate the dial? 

    If both are working properly, there may be something preventing the dial from completely depressing. You may need to take the dial off and make sure there is nothing blocking the assembly and preventing the button to be fully depressed. 

    Best Regards, 

    Justin Beigel

  • 0 in reply to Justin Beigel
    TI__Genius 15900 points

    No, the LED's are not responding to any commands. I see only 3 LED's lit up as the picture below shows:

    I removed the second cover, but could not find anything wrong with the button and the magnet. I tried with a separate magnet as well, without observing any different behavior. For the most part the board is unresponsive. I'll probe the signals with a scope next.

    Thanks!

  • 0 in reply to Lenio Cacula
    TI__Genius 17690 points

    Hello, 

    This seems like it still may be more of a software issue. The parts on the board won't be responsive until they get their configuration from the SCB. This always happens at the start of the SCB firmware when it is powered on. I would try putting the SCB into DFU mode and letting the GUI re-flash the firmware. 

    Best Regards, 

    Justin 

  • 0 in reply to Justin Beigel
    TI__Intellectual 1395 points

    Hey Justin,

    I'm experiencing the same issue with my EVM as well. The GUI appears to recognize the SCB but not the EVM it's connected to. As with Lenio, I see three LEDs light up but no changes when pressing the buttons, Knob, or rotating the knob. 

    I have also attempted to enter "DFU", but when I do the SCB no longer has it's COM port open, so then the GUI does not see it. I have verified in device manager the COM port no longer is there.

    Any further steps we can try?

    Best,

    Jacques St. Louis

  • 0 in reply to Jacques S
    TI__Genius 17690 points

    Hello Jacques, 

    When the SCB is in DFU mode, it will not show up in the COM ports but the GUI should still recognize it. When the SCB is in DFU mode, LED1 of the SCB should be turned off. While the SCB is in DFU mode, you can go to the File->Program Device option in the GUI and it will flash the SCB with the proper firmware. 

    If the 'Program Device' option is greyed out, then the board is either not in DFU mode or the computer is not recognizing it when it is in DFU mode. One thing you can try doing if this is the case is making sure the PAMB Drivers are installed on your computer. 

    Best Regards, 

    Justin Beigel

  • 0 in reply to Justin Beigel
    TI__Intellectual 1395 points

    Hey Justin,

    I just reconnected the EVM and appears my PC worked for the firmware update via the desktop GUI instead of the cloud. In addition, didn't know the Firmware update could still happen even though the GUI said the EVM was disconnected. After re-flashing the device it's operating as expected.

    Thank you

    -Jacques St. Louis

  • 0 in reply to Jacques S
    TI__Genius 17690 points

    Hello Jacques, 

    Glad the EVM is working for you now. Thanks for your feedback on it working on the desktop but not on the cloud GUI. We will make sure to look into that a bit more. 

    Let us know if you have any other issues. 

    Best Regards, 

    Justin Beigel